Yes, you can purchase aftermarket white wall tires both thin and wide stripe. However: if you do change tires tires and they are different brands I would recomend you change both tires at the same time. By doing this you will ensure the tire patterns are are the same as well as the compound.
Just my two cents worth.
Have a great day and be safe.
Absolutely... You can get them most places that sell motorcycle tires... I just put a set bought on-line from Motorcycle Superstore on my Heritage. Good price free shipping... They do have Harley Davidson on the side.